Finding the Fourth Proportional to 11,940.78, 17,910.72 and 4,043.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,940.78 : 17,910.72 = 4,043.89 : x
2. Step 2: Convert to fraction form
   11,940.78/17,910.72 = 4,043.89/x
3. Step 3: Cross multiply
   11,940.78x = 17,910.72 × 4,043.89
4. Step 4: Simplify right side
   11,940.78x = 72,429,003.89
5. Step 5: Solve for x
   x = 72,429,003.89/11,940.78
6. Step 6: Final answer
   x = 6,065.68